The aerosol penetration through an electret fibrous filter |
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| Authors: | Jiang Wei Cheung Chun-Shun Chan Cheong-Ki and Zhu Chao |
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| Affiliation: | Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China; College of Sciences, Shenyang University of Technology, Shenyang 110023, China; Department of Applied Mathematics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, SAR, China; Department of Mechanical Engineering, New Jersey Institute of Technology, USA |
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| Abstract: | The aim of this paper is to present a theoretical study of the aerosol penetration
through an electret fibrous filter, using a numerical approach. The aerosol sizes
considered in this study were in the submicron range, and in the numerical model,
the conventional mechanical mechanisms (impaction, interception, diffusion and
gravitationally settling) were taken into consideration along with the electrostatic
mechanisms, including the Coulombic and dielectrophoretic effects. The aerosol
penetration through an electret fibrous filter is heavily dependent on the aerosol
penetration of a single fibre. The aerosol penetration through a single electret
fibre under various filtration conditions was calculated. The effects of aerosol
diameter, aerosol and fibre charge state, face velocity, packing density and aerosol
dielectric constant on the aerosol penetration were investigated. |
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| Keywords: | electrostatic mechanism mechanical mechanism aerosol penetration through an electret fibre |
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